SANCTI HILARII LIBER DE SYNODIS, SEU DE FIDE ORIENTALIUM.
41. Ut essentiae nomine, ita sunt unum essentiae genere. 0513C
58. Filius ex Dei substantia, non ut creaturae ex voluntate. 0520C
71. Et pie dici potest, et pie taceri. ---Non est, 0527B
78. Orientalium laus ob haeresim coercitam. ---O 0530C 0531A 0531B
82. Quo sensu judicio communi damnetur. ---Sed 0535A
83. Quod pie a Nicaena synodo susceptum, non debeat 0535B improbari. 0535C
67. Many of us, beloved brethren, declare the substance of the Father and the Son to be one in such a spirit that I consider the statement to be quite as much wrong as right. The expression contains both a conscientious conviction and the opportunity for delusion. If we assert the one substance, understanding it to mean the likeness of natural qualities and such a likeness as includes not only the species but the genus, we assert it in a truly religious spirit, provided we believe that the one substance signifies such a similitude of qualities that the unity is not the unity of a monad but of equals. By equality I mean exact similarity so that the likeness may be called an equality, provided that the equality imply unity because it implies an equal pair, and that the unity which implies an equal pair be not wrested to mean a single Person. Therefore the one substance will be asserted piously if it does not abolish the subsistent personality or divide the one substance into two, for their substance by the true character of the Son’s birth and by their natural likeness is so free from difference that it is called one.
67. Homousion quando recte praedicetur.---Multi ex nobis, Fratres charissimi, ita unam substantiam Patris et Filii praedicant, ut videri possint non magis id pie quam impie praedicare: habet enim hoc verbum in se et fidei conscientiam, et fraudem paratam. Nam si secundum naturae proprietatem ac similitudinem, ut similitudo non speciem solam afferat, sed genus teneat; religiose unam substantiam praedicamus, dummodo unam substantiam proprietatis similitudinem intelligamus, ut quod unum sunt, non singularem 0525B significet, sed aequales. Aequalitatem dico, id est, indifferentiam similitudinis, ut similitudo habeatur aequalitas; aequalitas vero unum idcirco dicatur esse, quia par si; unum autem, in quo par significatur, non ad unicum vendicetur. Una igitur substantia, si non personam subsistentem perimat, nec unam substantiam partitam in duos dividat, religiose praedicabitur: quae ex nativitatis proprietate, et ex naturae similitudine ita indifferens sit, ut una dicatur.